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[22:37:27 ERROR]: Could not pass event InventoryClickEvent to PlayerMessagePlugin v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1854) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.PacketPlayInWindowClick.a(SourceFile:33) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.PacketPlayInWindowClick.a(SourceFile:10) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_91]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_91]
        at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:732) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:668) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:567) [spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
Caused by: java.lang.IllegalArgumentException: Effect cannot be null
        at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at org.bukkit.craftbukkit.v1_10_R1.CraftWorld$1.playEffect(CraftWorld.java:1482) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at org.bukkit.craftbukkit.v1_10_R1.CraftWorld.playEffect(CraftWorld.java:846) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at org.bukkit.craftbukkit.v1_10_R1.CraftWorld.playEffect(CraftWorld.java:821) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]
        at com.attempt2.test.event.inventory.InventoryClick.onInvetoryClick(InventoryClick.java:32) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.10.2.jar:git-Spigot-1e4dd71-4507d99]